Any interactive history world map out there?

Is there anywhere a world map, like Google maps or something, where you can change years and have the borders change? For example you want to see European borders during the cold war and you just change the year to 1980,etc?

In Google Earth you can change the years to see old satellite photos of the earth, but the borders remain the same and I would like to see for example what country one city was in this or that year, but I don’t know how to do that.

came up with two … each one having different intent/focus:
http://www.timemaps.com/history

here’s another one of only europe:
http://worldology.com/Europe/europe_history_lg.htm

ftr … flash probably needs to be enabled in each website listed above … i had to “refresh” the page for one to work accurately. the maps are interactive … feel free to click and hover.

you might find add’l websites … using “interactive history world map” as a google filter.